EP 1480031 A3 20070117 - Low-u road evaluation device and power distribution control device for four-wheel drive vehicles
Title (en)
Low-u road evaluation device and power distribution control device for four-wheel drive vehicles
Title (de)
Vorrichtung zur Bestimmung des Reibwerts einer Fahrbahn und Antriebsverteilungssytem für Fahrzeuge mit Vierradantieb
Title (fr)
Dispositif d'estimation du coefficient d'adhérence d'une chaussée et dispositif de répartition d'effort pour vehicule à quatre roues motrices
Publication
Application
Priority
JP 2003140941 A 20030519
Abstract (en)
[origin: EP1480031A2] A power distribution control device 42 calculates a low-µ information magnitude, associated with the friction coefficient of the road surface, based on the slip rate and the vehicle acceleration operation magnitude. If the low-µ information magnitude exceeds an addition evaluation threshold, the power distribution control device 42 adds the low-µ information magnitude. If the low-µ information magnitude does not exceed the addition evaluation threshold, the power distribution control device 42 subtracts a constant K from a counter. The power distribution control device 42 makes evaluates a road to have a low-µ when the counter exceeds a low-µ evaluation threshold.
IPC 8 full level
G01N 19/02 (2006.01); B60K 17/346 (2006.01); B60K 17/348 (2006.01); B60K 28/16 (2006.01); B60R 16/02 (2006.01); B60T 8/00 (2006.01); B60T 8/172 (2006.01); B60W 40/10 (2012.01); B60K 23/08 (2006.01)
CPC (source: EP US)
B60K 28/16 (2013.01 - EP); B60T 8/172 (2013.01 - EP US); B60K 23/08 (2013.01 - EP US); B60T 2210/12 (2013.01 - EP US); B60W 2520/105 (2013.01 - EP US); B60W 2552/40 (2020.02 - EP US)
Citation (search report)
- [A] EP 0428777 A1 19910529 - SUMITOMO ELECTRIC INDUSTRIES [JP]
- [A] US 6094614 A 20000725 - HIWATASHI YUTAKA [JP]
- [A] US 5351192 A 19940927 - TSUYAMA TOSHIAKI [JP], et al
- [A] US 5406486 A 19950411 - KAMIO SHIGERU [JP], et al
- [A] US 5809445 A 19980915 - YAMAMOTO OSAMU [JP], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL HR LT LV MK
DOCDB simple family (publication)
EP 1480031 A2 20041124; EP 1480031 A3 20070117; EP 1480031 B1 20080409; DE 602004012921 D1 20080521; DE 602004012921 T2 20090528; JP 2004338685 A 20041202; JP 4186701 B2 20081126; US 2005004741 A1 20050106; US 7487028 B2 20090203
DOCDB simple family (application)
EP 04011828 A 20040518; DE 602004012921 T 20040518; JP 2003140941 A 20030519; US 84696004 A 20040513